. The elements of structural . Petals. 5 Polypetalous. Hypogynous. X MonadelphouB United in aring. One-celled. Hypogynous. 00 Syncarpous. Superior. Carpels as manyas the stigmas, j CHAPTEE V. EXAMINATION OF COMMON PLANTS VaTH PERIGYNOUS ST.\MENS GARDEN PEA. WILLOW-HERB, SWEET-BRIER, CKAB-APPLE. 35. Garden Pea. In the flower of this plant, thecalyx is constructed on the same -plan as in the are five sepals, coherent below, and spreading outinto distinct teeth above Tig. 35). The calyx is there-fore gamosepalous. Exam
. The elements of structural . Petals. 5 Polypetalous. Hypogynous. X MonadelphouB United in aring. One-celled. Hypogynous. 00 Syncarpous. Superior. Carpels as manyas the stigmas, j CHAPTEE V. EXAMINATION OF COMMON PLANTS VaTH PERIGYNOUS ST.\MENS GARDEN PEA. WILLOW-HERB, SWEET-BRIER, CKAB-APPLE. 35. Garden Pea. In the flower of this plant, thecalyx is constructed on the same -plan as in the are five sepals, coherent below, and spreading outinto distinct teeth above Tig. 35). The calyx is there-fore gamosepalous. Examine next the form of the corolla (Fig. 3G).One difference between this corolla and those of theprevious plants will strike you at once. In the flowers ELEMENTS OF STRUCTURAL BOTANY. 27 of the latter you will re-member that each petalwas precisely like itsfellows in size audshape, and we there-fore spoke of the corollaas rcijular. In the Pea,on the other hand, oneof the petals is large,broad, aud open, whilsttwo smaller ones, in Fig. Fig. 38, Fig. 37. the front of the flower, areunited into a kind of hood. We shall speak of thiscorolla, then, and all others in which the petals areunlike each other in size or shape, as inrtjular. As the Pea blossom bears some resemblance to abutterfly, it is said to be papilionaceous. 36. Remove now the calyx-teeth and the petals,being very careful not to injure the stamens and thepistil, enveloped by those two which form the the stamens, and notice their form (Fig. 37).You will find ten, one by itself, and the other nine withthe lower halves of their filaments joined together, orcoherent. When stamens occur in this way, in twodistinct groups, they are said to be diadclphous ; if inthree groups, they would be triadelphons; if in severalgroups, poh/adelphoKs. In the Mallow, you will remem-ber, they are united into one group, and therefore wedescribed them as monadelphom. You will perhaps be a little puzzled in trying todetermine to
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1879
